movie where a little girl wants to be a mailperson

In 2013, there are no highways, no I-ways, no dreams of a better tomorrow, only scattered survivors across what was once the United States. Into this apocalyptic wasteland comes an enigmatic drifter with a mule, a knack for Shakespeare, and something yet undiscovered: the power to inspire hope.

A happy go lucky postman stumbles upon an empty house.

Now that Santa and Mrs. Claus have the North Pole running smoothly, the Counsel of Legendary Figures has called an emergency meeting on Christmas Eve! The evil Jack Frost has been making trouble, looking to take over the holiday! So he launches a plan to sabotage the toy factory and compel Scott to invoke the little-known Escape Clause and wish he'd never become Santa.